On March 2, 2:49 a.m. EST, a two-stage SpaceX Falcon 9 rocket lifts off from Launch Complex 39A at NASA’s Kennedy Space Center in Florida for Demo-1, the first uncrewed mission of the agency’s Commercial Crew Program. http://www.nasa.gov/sites/default/files/thumbnails/image/46531972754_27aefcb3cb_k.jpg

One of the greatest challenges of the fourth phase of Air-to-Air Background Oriented Schlieren flights, or AirBOS flight series was timing. http://www.nasa.gov/sites/default/files/thumbnails/image/f4_p3_cam_plane_drop_new_2-22-19.jpg

Nancy Grace Roman, NASA's first chief astronomer, is known as the 'Mother of Hubble.' http://www.nasa.gov/sites/default/files/thumbnails/image/27154773587_c99105746d_k.jpg

NASA Administrator Jim Bridenstine was photographed inside the Super Guppy aircraft that will carry the flight frame with the Orion crew module to a testing facility in Ohio. http://www.nasa.gov/sites/default/files/thumbnails/image/47300989392_663a074b76_k.jpg

The Soyuz rocket is transported by train to the launch pad, Tuesday, March 12, 2019 at the Baikonur Cosmodrome in Kazakhstan. http://www.nasa.gov/sites/default/files/thumbnails/image/46634947384_8ecb255750_o.jpg

Stephanie Wilson is a veteran of three spaceflights--STS-120, STS-121 and STS-131--and has logged more than 42 days in space. http://www.nasa.gov/sites/default/files/thumbnails/image/jsc2007e08828.jpg

The Soyuz rocket is seen at dawn on launch site 1 of the Baikonur Cosmodrome, Thursday, March 14, 2019 in Baikonur, Kazakhstan. http://www.nasa.gov/sites/default/files/thumbnails/image/33498981418_5880fa2253_k.jpg

The Soyuz MS-12 spacecraft lifted off with Expedition 59 crewmembers on a journey to the International Space Station. http://www.nasa.gov/sites/default/files/thumbnails/image/47328135122_85619ed320_o.jpg

​Electronics technician Anna Noe makes final checks to the Doppler Aerosol Wind Lidar (DAWN) before it begins a cross-country road trip for use in an upcoming airborne science campaign. http://www.nasa.gov/sites/default/files/thumbnails/image/lrc-2019-h1_p_dawn-031115.jpg

Apollo 11 backup crew members Fred Haise (left) and Jim Lovell prepare to enter the Lunar Module for an altitude test. http://www.nasa.gov/sites/default/files/thumbnails/image/apollo_11_bu_crew_lovell_haise_lm_alt_test_mar_20_1969_ap11-69-h-548hr.jpg

The waxing gibbous moon is pictured above Earth's limb as the International Space Station was orbiting 266 miles above the South Atlantic Ocean. http://www.nasa.gov/sites/default/files/thumbnails/image/stationmoon.jpg

Margaret W. ‘Hap’ Brennecke was the first female welding engineer to work in the Materials and Processes Laboratory at NASA’s Marshall Space Flight Center. http://www.nasa.gov/sites/default/files/thumbnails/image/hap_brennecke_1.jpg

This fuzzy orb of light is a giant elliptical galaxy filled with an incredible 200 billion stars. http://www.nasa.gov/sites/default/files/thumbnails/image/potw1911a.jpg

NASA astronaut Nick Hague completed the first spacewalk of his career on Friday, March 22, 2019. He and fellow astronaut Anne McClain worked on a set of battery upgrades for six hours and 39 minutes, on the International Space Station’s starboard truss. http://www.nasa.gov/sites/default/files/thumbnails/image/nick.jpg

A static hot-fire test of the Orion spacecraft's Launch Abort System Attitude Control Motor to help qualify the motor for human spaceflight, to help ensure Orion is ready from liftoff to splashdown for missions to the Moon. http://www.nasa.gov/sites/default/files/thumbnails/image/ngacm1_1.jpg

When Joan Stupik was a child, her parents bought her a mini-planetarium that she could use to project the stars on her bedroom ceiling. http://www.nasa.gov/sites/default/files/thumbnails/image/joan_stupik.jpeg

A small asteroid was caught in the process of spinning so fast it’s throwing off material, according to new data from NASA’s Hubble Space Telescope and other observatories. http://www.nasa.gov/sites/default/files/thumbnails/image/stsci-h-p1922a-m-2000x1164.png

This star-studded image shows us a portion of Messier 11, an open star cluster in the southern constellation of Scutum (the Shield). Messier 11 is also known as the Wild Duck Cluster, as its brightest stars form a “V” shape that somewhat resembles a flock of ducks in flight. http://www.nasa.gov/sites/default/files/thumbnails/image/potw1912a.jpg

Astronaut Nick Hague performs a spacewalk on March 29, 2019. http://www.nasa.gov/sites/default/files/thumbnails/image/iss059e005744.jpg

In Alaska, 5 percent of the land is covered by glaciers that are losing a lot of ice and contributing to sea level rise. http://www.nasa.gov/sites/default/files/thumbnails/image/46713638424_0f32acec3f_k.jpg